Maybe a silly question, but the DIYAudio Store has a PCB and a "naked" PCB which looks like a blank PCB from the images. It only refers to "A ground plane is also available for purchase so that you can build it naked just like they did at BAF (if you're into that kind of thing)." Since I wasn't at BAF I have no idea to what this is referring to.
Can someone please clarify ?
Can someone please clarify ?
If, like me, you're ordering from Mouser and trying to avoid also ordering from Digikey, and you do want to use the exact power jack Papa spec's on his article, here's the Mouser link
jack: PJ-037B CUI Devices | Mouser
and the correct PS to go with that jack: WSU240-0500-13 Triad Magnetics | Mouser
In that same vain, here's the Mouser link for the exact same heatsinks that Papa specs from Digikey in the article: 551002B00000G Aavid | Mouser
jack: PJ-037B CUI Devices | Mouser
and the correct PS to go with that jack: WSU240-0500-13 Triad Magnetics | Mouser
In that same vain, here's the Mouser link for the exact same heatsinks that Papa specs from Digikey in the article: 551002B00000G Aavid | Mouser
ALPS volume pot
The ACP+ is my second project from DIY Audio after building the Starving Student HPA, which had the convenience of having all parts available for purchase. So, my apologies for this newbie question.
I am trying to find the ALPS 519G volume pot as specified in the BOM, but have a hard time finding it. I found PE Express has some that seem suitable, but there is no reference to 519G.
The ACP+ is my second project from DIY Audio after building the Starving Student HPA, which had the convenience of having all parts available for purchase. So, my apologies for this newbie question.
I am trying to find the ALPS 519G volume pot as specified in the BOM, but have a hard time finding it. I found PE Express has some that seem suitable, but there is no reference to 519G.
Ah fantastic. Thanks for clarifying. I'm going to put it into a small chassis so I'll stick with just the PCB.
--Tom
Finished up my ACP+. Sounds fantastic! Especially like the combo with my 32R Grado’s 
I used pin sockets for Rccs (R4) so I could measure and dial in according to my specific J74 and J113 combo. I also used pin sockets for the output and follower Rdegens (R12 and R13) so I could play around with distortion spectra, though I’ll say it sounds perfect as-is.
Really enjoyed this one! And building case-less allowed me to indulge my ocd for a clean and tidy build. Thanks Nelson and co!
I used pin sockets for Rccs (R4) so I could measure and dial in according to my specific J74 and J113 combo. I also used pin sockets for the output and follower Rdegens (R12 and R13) so I could play around with distortion spectra, though I’ll say it sounds perfect as-is.Really enjoyed this one! And building case-less allowed me to indulge my ocd for a clean and tidy build. Thanks Nelson and co!
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Here's a quick distortion measurement, 1K at 1V into 330R. Please note that I don't have much of a 'setup,' just a Focusrite and REW. That said, ACP measures really quiet and the distortion signature does look a lot like the J2. Pretty good, especially considering its sitting in open air and surrounded by gear.
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